WO2022021718A1

WO2022021718A1 - Continuous conduit apparatus based on guide injection integrated mechanism

Info

Publication number: WO2022021718A1
Application number: PCT/CN2020/133655
Authority: WO
Inventors: 高明忠; 谢和平; 杨明庆; 陈领; 赵乐; 李佳南; 余波; 李聪; 何志强; 胡云起
Original assignee: 深圳大学
Priority date: 2020-07-28
Filing date: 2020-12-03
Publication date: 2022-02-03
Also published as: US20230349245A1; CN111997540A

Abstract

A continuous conduit apparatus based on a guide injection integrated mechanism, comprising a straightening apparatus (8) and a pair of chain wheel and chain clamping assemblies (1) used for clamping a conduit (7) and pulling the conduit (7) to descend into a well or be pulled out, a conduit guide channel for the conduit (7) to pass through being formed between the chain wheel and chain clamping assemblies (1), and an inlet and an outlet of the conduit guide channel being not on a same straight line; the straightening apparatus (8) being used for straightening the conduit (7); and the two chain wheel and chain clamping assemblies (1) each comprising a chain wheel set, a chain, clamping blocks (3) mounted on the chain, and push plates used for pressing the clamping block (3), preferably, the conduit guide channel being in a circular arc shape, and a clamping surface of the clamping blocks (3) having a certain radian in a guide direction. Guide and injection functions are integrated, and the straightening apparatus (8) is additionally provided, so that it can be ensured that underground abrasion is not increased while the height of a device is effectively reduced; and the present invention is particularly suitable for operation environments having limited space height, such as operation in coal mine tunnels.

Description

Continuous catheter device based on integrated mechanism of guided injection

technical field

The invention relates to the technical field of underground exploration, in particular to a continuous conduit device based on an integrated mechanism of steering and injection.

Background technique

As shown in FIG. 1 , the existing coiled tubing operation equipment generally includes a guide gooseneck (No. 100 ) and an injection head (No. 200 ), and the guide gooseneck is used to guide the coiled tubing into the injection head. The main functions of the injection head are:

(1) Apply axial force to the coiled tubing to overcome the self-weight of the coiled tubing and the buoyancy and friction in the wellbore, and provide sufficient push and pull forces to control the coiled tubing exiting and entering the well;

(2) Bearing the hanging weight of the entire coiled tubing when the coiled tubing is stationary;

(3) Provide enough clamping force to prevent relative sliding between the coiled tube and the clamping block;

(4) Under different circumstances, control the lifting and lowering speed of the coiled tube;

(5) Provide a working platform for finger load sensors and encoders;

(6) Bear the self-weight and additional load of all coiled pipes.

The inlet of the existing coiled tubing injection head is located directly above the outlet. The injection head itself has a certain height, and the height of the guide gooseneck leads to a high height of the whole equipment, which is not suitable for the working environment with limited space height ( For example, coal mine roadway, generally no more than 3m in height).

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides a continuous catheter device based on a guide-injection integrated mechanism.

The present invention is achieved through the following technical solutions:

A continuous conduit device based on an integrated mechanism for guiding and injecting, including a straightening device and a pair of sprocket and chain clamping assemblies for clamping the conduit and pulling the conduit down or pulling out. A catheter guide channel for the catheter to pass through can be formed, and the inlet and the outlet of the catheter guide channel are not in a straight line; the straightening device is used for straightening the catheter.

Further, the conduit guide channel is arc-shaped.

Further, the two sprocket chain clamping assemblies each include a sprocket set, a chain, a clamping block mounted on the chain, and a push plate for pressing the clamping block;

The push plate is an arc-shaped plate, and the push plates of the two sprocket chain clamping assemblies are arranged concentrically; the push plate of at least one sprocket chain clamping assembly is connected with a clamping driving device for driving the radial movement thereof;

The push plates of the two sprocket chain clamping assemblies are used to form the guide channel between the partial clamping blocks of the two sprocket chain clamping assemblies, and to make the part of the two sprocket chain clamping assemblies clamp the parts. Hold the block to clamp the catheter.

Further, the push plate presses the clamping block through the bearing roller.

Wherein, the sprocket set of the sprocket chain clamping assembly located on the outer periphery includes a driving wheel, a tensioning wheel and a driven wheel; the sprocket set of the sprocket chain clamping assembly located at the inner circumference includes at least a driving wheel and a driven wheel.

Preferably, the clamping driving device is an oil cylinder.

Further, the clamping surface of the clamping block has a certain arc in the guiding direction.

Preferably, the included angle between the inlet direction and the outlet direction of the conduit guide passage is an acute angle, and an arc guide short section is provided at the inlet of the conduit guide passage.

Preferably, the straightening device is a roller straightening device.

Further, the straightening device includes a bracket, a first roller, a second roller, a crank arm and a pressing oil cylinder; there are at least two first rollers, and the first rollers are arranged in a linear direction;

One end of the crank arm is movably connected to the bracket, the second roller is rotatably installed at the inflection point of the crank arm, and the output end of the pressing oil cylinder is connected to the other end of the crank arm so that the first roller is connected to the first roller. A straightening channel is formed between the two rollers.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention integrates the guiding and injection functions, can save the guiding gooseneck, and can effectively reduce the height of the equipment; it is especially suitable for the working environment with limited space height; the present invention can straighten the continuous conduit through the straightening device, which is beneficial to ensure The continuous conduit enters the well vertically, which can effectively reduce the downhole wear.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the embodiments of the present invention, and constitute a part of the present application, and do not constitute limitations to the embodiments of the present invention.

Fig. 1 is the structural representation of prior art;

2 is a schematic structural diagram of Embodiment 1;

Fig. 3 is the schematic diagram of the partial position when the clamping block clamps the catheter;

Fig. 4 is the sectional view at A-A place in Fig. 3;

5 is a partial schematic view of a catheter guide channel;

Fig. 6 is the schematic diagram when the present invention is used;

7 is a schematic structural diagram of Embodiment 2;

FIG. 8 is a schematic structural diagram of the third embodiment.

detailed description

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. as a limitation of the present invention.

Example 1

As shown in FIG. 2 , the continuous conduit device based on the integrated guide injection mechanism disclosed in this embodiment includes a straightening device 8 and a first sprocket chain clamp for clamping the conduit 7 and pulling the conduit 7 downhole or pulling out. Assembly 1 and the second sprocket chain clamping assembly 2, the first sprocket chain clamping assembly 1 and the second sprocket chain clamping assembly 2 can form a conduit guide channel for the conduit to pass through, and the inlet and outlet of the conduit guide passage not in a straight line.

In order to make the deformation of the catheter smoother, the guide channel of the catheter is arc-shaped.

In this embodiment, the first sprocket chain clamping assembly 1 includes a first driving pulley 11 , a first tensioning pulley 14 , a first driven pulley 12 , a first chain 13 , a first push plate 15 , and a first chain 13 . Several clamping blocks 3 on the upper; the first driving wheel 11, the first tensioning wheel 14 and the first driven wheel 12 are not in a straight line, the first chain 13 and the first driving wheel 11, the first tensioning wheel 14 and the first A driven wheel 12 meshes.

The second sprocket chain clamping assembly 2 includes a second driving wheel 21 , a second driven wheel 22 , a second chain 23 , a second push plate 25 and a plurality of clamping blocks 3 mounted on the second chain 23 . The second chain 23 meshes with the second driving wheel 21 and the second driven wheel 22;

The first push plate 15 and the second push plate 25 are arc-shaped plates, the first push plate 15 and the second push plate 25 are concentrically arranged, and the radius of the first push plate 15 is smaller than that of the second push plate 25 .

Of course, both the first driving wheel 11 and the second driving wheel 21 are connected with a traction motor. The first driving wheel 11, the first tensioning wheel 14, the first driven wheel 12, the second driving wheel 21, the second driven wheel 22 and the second chain 23 are all mounted on the frame. The traction motor and the frame are not shown in the figures, which are conventional techniques in the art, and will not be repeated here.

In this embodiment, the second push plate 25 is connected with a clamping driving device 4 for driving it to move in the radial direction; the clamping driving device 4 is an oil cylinder.

The first push plate 15 and the second push plate 25 are used to form a guide channel between the part of the clamping block 3 on the first chain 13 and the part of the clamping block 3 on the second chain 23 and to make the first chain 13 and the This part of the gripping block 3 on the second chain 23 grips the conduit 7 .

In this embodiment, both the inner and outer sides of the first tensioning pulley 14 are engaged with the first chain 13 . A first push plate 15 is provided between the first driving wheel 11 and the first tensioning wheel 14 and between the first tensioning wheel 14 and the first driven wheel 12 .

In this embodiment, one end of the second push plate 25 starts from the second driving wheel 21 , and the other end of the second push plate 25 extends to the second driven wheel 22 . Since the arc length of the second push plate 25 is relatively long, at least two clamping driving devices 4 are connected to the second push plate 25 to ensure sufficient clamping force.

As shown in Figures 3, 4 and 5, the clamping blocks 3 are arranged on the chain one by one. There are gaps 31 between adjacent clamping blocks 3 . The first push plate 15 and the second push plate 25 arrange the plurality of clamping blocks 3 along the arc direction thereof to form the conduit guide channel 6 , and then guide the conduit 7 .

The clamping surfaces of the clamping blocks 3 on the first chain 13 and the second chain 23 have a certain curvature in the guiding direction, so as to be in contact with the guide tube 7, increasing the clamping force and making the deformation of the guide tube 7 smoother.

As shown in FIG. 3 , a bearing roller 16 is installed on the clamping block 3 , the first push plate 15 presses the bearing roller 16 of the clamping block 3 on the first chain 13 , and the second push plate 25 presses the second chain 23 The bearing roller 16 of the clamping block 3 is clamped.

Of course, the bearing roller 16 can also be mounted on the push plate.

The conduit guide channel 6 is arc-shaped. When the conduit is injected into the conduit, the conduit 7 undergoes plastic bending deformation at the conduit guide channel 6, so the conduit 7 coming out of the conduit guide channel 6 has residual bending. Eccentric wear occurs with the borehole wall, thereby increasing downhole wear.

The present invention adds a straightening device 8 to straighten the conduit 7, which can eliminate the residual bending of the conduit 7 to the greatest extent, is beneficial to ensure that the continuous conduit 7 enters the well vertically, and can effectively reduce the downhole wear.

In this embodiment, the straightening device 8 is selected as a roller straightening device. There are many roller straightening devices, which can be selected according to needs.

The straightening device 8 disclosed in the present invention includes a bracket 81 , a first roller 82 , a second roller 83 , a crank arm 84 and a pressing oil cylinder 85 ; the first roller 82 is installed on the bracket 81 , and there are at least two first rollers 82 , the first rollers 82 are arranged in a linear direction. One end of the crank arm 84 is movably connected with the bracket 81 , the second roller 83 is rotatably installed at the inflection point of the crank arm 84 , and the output end of the pressing oil cylinder 85 is connected with the other end of the crank arm 84 so that the second roller 83 can be pressed against the conduit 7 , so that a straightening channel is formed between the first roller 82 and the second roller 83 .

The working principle of the present invention:

As shown in Figures 2 and 6, the conduit 7 is wound on the reel 9, and the free end of the conduit 7 passes between the clamping blocks 3 of the first chain 13 and the second chain 23;

The first push plate 15 and the second push plate 25 press the clamping block 3 on the first chain 13 and the second chain 23, so that the clamping block 3 clamps the conduit 7;

The rotation of the first driving wheel 11 and the second driving wheel 21 drives the first chain 13 and the second chain 23 to move, and then drives the clamping block 3 to move, so that the conduit 7 clamped by the clamping block 3 goes down the well or in the direction of pulling out. move;

The conduit 7 coming out of the conduit guiding passage is straightened through the straightening passage and then enters the well vertically.

Embodiment 2

The difference between this embodiment and the first embodiment is: as shown in FIG. 7 , in this embodiment, the second sprocket chain clamping assembly 2 further includes a second tensioning wheel 24 meshing with the second chain 23 , the second driving wheel 21. The second tensioning pulley 24 and the second driven pulley 22 are not in a straight line.

In this embodiment, an arc-shaped guide short section 5 is provided at the entrance of the catheter guide channel, and the arc-shaped guide short section 5 guides the catheter 7 to enter the catheter guide channel more smoothly. The arc guide short section 5 is concentric with the guide channel of the catheter and has the same radius.

The arc guide short section 5 is located below the inlet of the guide channel of the guide tube, and has a certain supporting effect on the guide tube 7 .

Embodiment 3

The difference between this embodiment and Embodiment 1 or Embodiment 2 is that, as shown in FIG. 8 , in this embodiment, the first push plate 15 is connected with a clamping driving device 4 for driving it to move in the radial direction.

The invention integrates the guiding and injection functions, and adds a straightening device, which can effectively reduce the height of the equipment and ensure that the downhole wear is not increased. The present invention is especially suitable for working environments with limited space height, such as working in coal mine tunnels.

The above specific embodiments further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Within the spirit and principle of the present invention, any modifications, equivalent replacements, improvements, etc. made should be included within the protection scope of the present invention.

Claims

The continuous conduit device based on the integrated mechanism of guiding and injecting is characterized in that it includes a straightening device and a pair of sprocket chain clamping assemblies for clamping the conduit and pulling the conduit down or pulling out. The pair of sprocket chains A conduit guiding channel for the conduit to pass through can be formed between the clamping components, and the inlet and the outlet of the conduit guiding channel are not in a straight line;

The straightening device is used for straightening the catheter.
The continuous catheter device based on the integrated mechanism of guiding and injecting according to claim 1, wherein the catheter guiding channel is arc-shaped.
The continuous catheter device based on the integrated guide injection mechanism according to claim 1 or 2, wherein the two sprocket chain clamping assemblies each include a sprocket group, a chain, a clamping block mounted on the chain, and a Push plate for pressing the clamping block;

The push plate is an arc-shaped plate, and the push plates of the two sprocket chain clamping assemblies are arranged concentrically; the push plate of at least one sprocket chain clamping assembly is connected with a clamping driving device for driving the radial movement thereof;

The push plates of the two sprocket chain clamping assemblies are used to form the guide channel between the partial clamping blocks of the two sprocket chain clamping assemblies and to make the parts on the two sprocket chain clamping assemblies The clamping block clamps the catheter.
The continuous catheter device based on an integrated guiding and injection mechanism according to claim 3, wherein the push plate presses the clamping block through the bearing roller.
The continuous catheter device based on the integrated guide injection mechanism according to claim 3, wherein the sprocket group of the sprocket chain clamping assembly located on the outer periphery comprises a driving wheel, a tensioning wheel and a driven wheel; The sprocket set of the sprocket chain clamping assembly includes at least a driving wheel and a driven wheel.
The continuous catheter device based on the integrated guiding and injection mechanism according to claim 3, wherein the clamping driving device is an oil cylinder.
The continuous catheter device based on the integrated guiding and injection mechanism according to claim 3, wherein the clamping surface of the clamping block has a certain arc in the guiding direction.
The continuous catheter device based on a guide-injection integrated mechanism according to claim 1, 2 or 7, wherein the included angle between the inlet direction and the outlet direction of the catheter guide channel is an acute angle, and the angle at the entrance of the catheter guide channel is an acute angle. With arc guide short section.
The continuous catheter device based on the integrated guiding and injection mechanism according to claim 1, wherein the straightening device is a roller straightening device.
The continuous catheter device based on an integrated guide injection mechanism according to claim 9, wherein the straightening device comprises a bracket, a first roller, a second roller, a crank arm and a pressing oil cylinder; the first roller has at least Two, the first roller is arranged in a straight line;

One end of the crank arm is movably connected to the bracket, the second roller is rotatably installed at the inflection point of the crank arm, and the output end of the pressing oil cylinder is connected to the other end of the crank arm so that the first roller is connected to the first roller. A straightening channel is formed between the two rollers.